.toumu {
    line-height: 50px;
}

.toumu a {
    font-size: 25px;
    color: white;
    text-decoration: none;
    display: inline-block;
    padding: 12px 85px;
    border-radius: 100px;
}

.toumu a:hover {
    background-color: #666565;
}

.subnav {
    width: 190PX;
    height: 400PX;
    display: inline-block;
}

.subnav li {
    height: 60px;
    line-height: 50px;
    padding-top: 1000px;
    display: inline-block;
}

.subnav li a {
    font-size: 25px;
    text-decoration: none;
    color: white;
    display: inline-block;
}

.subnav h2 {
    font-size: 25px;
    color: white;
    padding-left: 40px;
    padding-top: 50px;
    display: inline-block;
}

body {
    perspective: 400px;
}

.box {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 100px auto;
    transition: all .6s;
    transform-style: preserve-3d;
}

.box:hover {
    transform: rotateY(180deg);
}

.front,
.back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    font-size: 30px;
    color: #fff;
    text-align: center;
    line-height: 300px;
}

.front {
    background-color: rgb(59, 59, 59);
    z-index: 1;
}

.back {
    background-color: rgb(17, 17, 17);
    transform: rotateY(180deg);
}

.box {
    margin-left: 1500px;
    display: inline-block;
}

.KIM h2 {
    margin-top: 100px;
}

.wo {
    position: relative;
    width: 4em;
    height: 4em;
    border: 3px solid #f8fbfc;
    overflow: hidden;
    animation: spin 3s ease infinite;
    margin-left: 50px;
    margin-top: 30px;
}

.wo::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    width: 4em;
    height: 4em;
    background-color: white;
    transform-origin: center bottom;
    transform: scaleY(1);
    animation: fill 3s linear infinite;
}

@keyframes spin {
    50%,
    100% {
        transform: rotate(360deg);
    }
}

@keyframes fill {
    25%,
    50% {
        transform: scaleY(0);
    }
    100% {
        transform: scaleY(1);
    }
}